The video "Church History in 34 Minutes - After AD 33" by St. Mark Coptic Orthodox Church provides an overview of key moments in Christian history, from the birth of the Church at Pentecost to the spread of Christianity by the apostles. It covers the legalization of Christianity under Constantine, the Great Schism between Eastern Orthodox and Roman Catholic branches, and the Protestant Reformation sparked by Martin Luther’s 95 Theses. The video highlights the major events and shifts that shaped the development of Christianity.